import { getToken, setToken, removeToken } from '@/utils/auth'
import router, { resetRouter } from '@/router'
import { adminLogin, getAdminUserInfo, adminLogout } from '@/api/admin'

const state = {
  token: getToken(),
  name: '',
  avatar: '',
  partnerOptions: [],
  env: '',
  lang: '',
  introduction: '',
  roles: []
}

const mutations = {
  SET_TOKEN: (state, token) => {
    state.token = token
  },
  SET_INTRODUCTION: (state, introduction) => {
    state.introduction = introduction
  },
  SET_NAME: (state, name) => {
    state.name = name
  },
  SET_AVATAR: (state, avatar) => {
    state.avatar = avatar
  },
  SET_ENV: (state, env) => {
    state.env = env
  },
  SET_LANG: (state, lang) => {
    state.lang = lang
  },
  SET_PARTNER_OPTIONS: (state, partnerOptions) => {
    state.partnerOptions = partnerOptions
  },
  SET_ROLES: (state, roles) => {
    state.roles = roles
  }
}

const actions = {
  // user login
  login({ commit }, userInfo) {
    const { username, password } = userInfo
    return new Promise((resolve, reject) => {
      adminLogin({ username: username.trim(), password: password }).then(response => {
        const { data } = response
        commit('SET_TOKEN', data.token)
        setToken(data.token)
        resolve()
      }).catch(error => {
        console.log(error)
        reject(error)
      })
    })
  },

  // get user info
  getInfo({ commit, state }) {
    return new Promise((resolve, reject) => {
      getAdminUserInfo().then(response => {
        const { data } = response
        if (!data) {
          reject('Verification failed, please Login again.')
        }

        const { name, default_lang, avatar, introduction, partner_options, env } = data

        commit('SET_ROLES', ['*'])
        commit('SET_NAME', name)
        commit('SET_AVATAR', avatar)
        commit('SET_LANG', default_lang)
        commit('SET_INTRODUCTION', introduction)
        commit('SET_PARTNER_OPTIONS', partner_options)
        commit('SET_ENV', env)
        resolve(data)
      }).catch(error => {
        reject(error)
      })
    })
  },

  // user logout
  logout({ commit, state, dispatch }) {
    return new Promise((resolve, reject) => {
      adminLogout(state.token).then(() => {
        commit('SET_TOKEN', '')
        commit('SET_ROLES', [])
        removeToken()
        resetRouter()

        // reset visited views and cached views
        // to fixed https://github.com/PanJiaChen/vue-element-admin/issues/2485
        dispatch('tagsView/delAllViews', null, { root: true })

        resolve()
      }).catch(error => {
        reject(error)
      })
    })
  },

  // remove token
  resetToken({ commit }) {
    return new Promise(resolve => {
      commit('SET_TOKEN', '')
      commit('SET_ROLES', [])
      removeToken()
      resolve()
    })
  },

  // dynamically modify permissions
  changeRoles({ commit, dispatch }, role) {
    return new Promise(async resolve => {
      const token = role + '-token'

      commit('SET_TOKEN', token)
      setToken(token)

      const { roles } = await dispatch('getInfo')

      resetRouter()

      // generate accessible routes map based on roles
      const accessRoutes = await dispatch('permission/generateRoutes', roles, { root: true })

      // dynamically add accessible routes
      router.addRoutes(accessRoutes)

      // reset visited views and cached views
      dispatch('tagsView/delAllViews', null, { root: true })

      resolve()
    })
  },
  // dynamically modify lang
  changeLang({ commit, dispatch }, lang) {
    return new Promise(async resolve => {

      // generate accessible routes map based on roles
      const lang = await dispatch('permission/generateRoutes', lang, { root: true })

      commit('SET_LANG', lang)
      resolve()
    })
  }
}

export default {
  namespaced: true,
  state,
  mutations,
  actions
}
